<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>案例-头像上传</title>
    <link rel="stylesheet" href="./lib/bootstrap-v4.6.0.css" />
    <style>
      .thumb-box {
        text-align: center;
        margin-top: 50px;
      }

      .thumb {
        width: 150px;
        height: 150px;
        object-fit: cover;
        border-radius: 50%;
      }
    </style>
  </head>

  <body>
    <div class="thumb-box">
      <!-- 头像 -->
      <img src="./images/cover.jpg" class="img-thumbnail thumb" alt="" />
      <div class="mt-2">
        <!-- 文件选择框 -->
        <!-- accept 属性表示可选择的文件类型 -->
        <!-- image/* 表示只允许选择图片类型的文件 -->
        <input
          type="file"
          id="iptFile"
          accept="image/*"
          style="display: none;"
        />
        <!-- 选择头像图片的按钮 -->
        <button class="btn btn-primary" id="btnChoose">选择 & 上传图片</button>
      </div>
    </div>
    <script src="./lib/axios.js"></script>
    <script>
     const thumb = document.querySelector('.thumb')
     const input = document.querySelector('#iptFile')
     const btn =document.querySelector('.btn')
    btn.addEventListener('click' ,function(){
      input.click()
    })
    input.addEventListener('change' ,function(){
    if(!input.files[0]) return
    const arr = new FormData()
    arr.append('avatar' , input.files[0])
      axios({
        url :'	http://ajax-api.itheima.net/api/file',
        method : 'POST',
        data : arr
      }).then(({data : res})=>{
       const data = res.data.url
       thumb.src = data
      })
    })
    </script>
  </body>
</html>
